58results about "Synchronisation" patented technology

Provided are a time synchronization method, a time synchronization system of an intelligent driving system, an electronic device and a storage medium, relating to the technical fields of autonomous driving, electronic technology, and time synchronization. The method includes: obtaining a second-level universal time and a corresponding Pulse Per Second signal; based on a first local timestamp of a captured Pulse Per Second signal, a second local timestamp of an execution time instant of an interrupt service routine, and a first global timestamp, determining a second global timestamp corresponding to a predetermined edge of the Pulse Per Second signal; based on a global timestamp of a current time instant and the second global timestamp, obtaining a sub-second time of the current time instant; based on the second-level universal time and the sub-second time, obtaining an accurate time of the current time instant.

The invention provides a real-time synchronization and noise suppression method and system for a photoetching sensor array, and the method comprises the steps: capturing scattered light intensity fluctuation during photoetching exposure to generate a time sequence calibration pulse, and calculating a time sequence offset by combining the pulse with an original data packet of a sensor through an FPGA timestamp synchronization engine; adjusting a trigger signal through a digital delay line to realize time sequence calibration; inputting the calibrated data into a self-adaptive wavelet threshold filter, generating a dynamic threshold based on the speed and vibration intensity of the workpiece table, and outputting purified data through wavelet decomposition, specific layer detail coefficient soft threshold processing and reconstruction; and finally, feeding back the noise residual error of the purified data to the FPGA, and triggering secondary calibration when the noise residual error exceeds a threshold value. Through deep cooperation of the hardware-level timestamp engine and the physical constraint filter, the problems of time sequence offset and noise interference of the sensor array are thoroughly solved.

The invention discloses a full-wave-band dynamic sunlight player with a three-stage coaxial soft light structure, and relates to the technical field of healthy lighting and high-precision simulation light sources. The core three-stage coaxial soft light structure is composed of a high-atomization concave soft light cavity, a convex high-reflection soft light structure and a full-coating high-transmittance soft light shell which are coaxial, and glare-free and high-uniformity full-wave-band light emitting is achieved. The equipment is provided with a full-wave band narrow-band combined lamp group covering weak ultraviolet rays to near infrared rays, so that a continuous sunlight spectrum is formed; single-band single-line independent driving is adopted, a pure hardware simulation gradual change control unit is matched, and non-stroboscopic smooth gradual change and accurate regulation and control are achieved. The equipment is provided with a local time service module and a storage medium, and a networking module can be selected to be matched with a factory spectrum calibration method to guarantee output consistency. The system can truly restore the natural sunlight spectrum, adapts to the biological rhythm, is suitable for medical treatment, laboratories, space stations and other scenes, and has the advantages of being high in reliability, continuous in spectrum, strong in soft light effect, high in biological friendliness and the like.

Optical frequency reference apparatus (10) comprising - an atomic vapor cell (1), containing a vapor of reference atoms, said atomic vapor cell (1) comprising a first end (41) having a first window (4) and a second end (61), - a laser source (11) for generating a laser probe beam (3) adapted to excite a two-photon optical transition of said reference atoms, - an optical detector (14), adapted to detect a fluorescence signal emitted by said reference atoms, and - at least one reflective element (5, 15) wherein the laser source (11), the atomic vapor cell (1) and the at least one reflective element (5, 15) are configured such that, in operation, the probe beam (3) enters the atomic vapor cell (1) through said first window (4) at said first end (41) and crosses said vapor of reference atoms until said second end (61) through a defined optical path in a first forward direction (3a), the probe beam (3) is reflected backwards by said at least one reflective element (5, 15) and crosses said vapor of reference atoms a second time through the same defined optical path, in a second direction (3b) opposite to the first forward direction (3a), characterized in that the optical frequency reference apparatus (10) further comprises means (7, 9) for absorbing the reflected laser probe beam (3) exiting from the atomic vapor cell (1) according to the second direction (3b).

The invention discloses a method and device for a system to automatically calibrate a court electric energy meter clock, a system terminal and a metering box, and relates to the technical field of clock calibration, and the method comprises the steps: querying a time synchronization information group recorded by an electric energy meter of a court; calculating a clock error of the electric energy meter at each temperature point according to the time synchronization information group; and carrying out clock calibration on the electric energy meter based on the clock error. Through system time acquisition and logic of calculating a target clock error according to the temperature, real clock skew at different temperatures can be accurately matched, the problems of excessive calibration at a low temperature and insufficient calibration at a high temperature are avoided, the accuracy of an electric energy meter clock can be effectively improved, and error accumulation caused by temperature change is reduced. And through systematic data processing and analysis, the calibration process is further optimized, and the overall efficiency is improved.

Disclosed is a quartz oscillator system comprising: a quartz oscillator comprising a quartz crystal and an oscillator circuit whose frequency is based on a resonant frequency of the quartz crystal; a monitoring module for monitoring an output frequency of the quartz oscillator; a control system external to the quartz oscillator, and configured to compare the output frequency with a setpoint frequency, and apply an adjustment signal to an electronic circuit of the quartz oscillator to adjust a frequency of the quartz oscillator based on the comparison with the reference frequency.

The application discloses a time synchronization method and system fusing power line carrier technology, comprising: calculating the required number of time synchronization terminal clock sources of a to-be-time-synchronized terminal according to the environment topology change condition corresponding to the to-be-time-synchronized terminal at the current time, the power line carrier channel state and the first historical local time keeping condition; wherein the first historical local time keeping condition is used for updating the second historical local time keeping condition at the next time; selecting the same number of time synchronization terminal clock sources of the to-be-time-synchronized terminal from the to-be-time-synchronized terminal corresponding to the time synchronization terminal clock sources to synchronize time with the terminal clock sources of the same level of the to-be-time-synchronized terminal; the number of time synchronization terminal clock sources can be dynamically optimized, and the power line carrier time synchronization robustness is improved.

The invention relates to a time keeping and service system based on an FPGA, and belongs to the field of time synchronization. The system comprises an IRIGB signal source, a timing system board and a main board, firstly, an IRIGB signal source is connected to a timing system board, under the condition that an IRIGB signal is effective, the timing system board analyzes the signal, the timing system board communicates with a main board by generating whole-second interruption, and the main board controls whether the timing system board sends an interruption signal or not by controlling interruption enabling and obtains state information of the timing system board; after the main board receives an interrupt signal of the timing system board, the main board accesses the timing system board through the PCI-E bus so as to obtain time information; and under the condition that no IRIGB source exists outside, the mainboard carries out time service on the timing system board, and the timing system board maintains the written time. The IRIGB signal time keeping and service system based on the FPGA has the advantages of being high in precision, good in real-time performance, high in anti-interference capacity, easy to integrate and maintain and the like.

The invention provides an audio output sampling rate calculation method and device, electronic equipment and a storage medium. The method is applied to an audio playing system, and comprises the following steps: in an audio data playing process of an audio buffer area, detecting a filling level of the audio buffer area according to a preset detection frequency; wherein the filling level is used for indicating the current data volume of the audio buffer area; based on the filling level, first clock skew corresponding to the recent multiple detection periods is obtained, and a clock skew set is obtained; calculating a first clock calibration amount according to a first clock skew corresponding to the current detection period in the clock skew set; performing clock drift trend prediction on the clock skew set, and determining a second clock calibration amount according to a prediction result; and according to the first clock calibration amount and the second clock calibration amount, determining the sampling rate of at least one frame of audio data output audio buffer in the future. The method and the device are used for carrying out real-time, accurate and self-adaptive clock calibration on audio playing.

An unmanned container truck automatic driving system time synchronization system, comprising: an automatic driving domain controller, a camera, an inertial navigation system and a laser radar, wherein: the camera is connected with the automatic driving domain controller through a MIPI interface; the inertial navigation system is connected with the automatic driving domain controller through an RS232 serial port line; the laser radar is connected with the automatic driving domain controller through an RS232 serial port line; PPS is distributed to the main SOC and the auxiliary SOC through the internal CPLD distribution of the controller, GPRMC signals are sent to multiple laser radars through multiple RS232 chip distributions, and GPRMC is sent to the main SOC and the auxiliary SOC through UDP, so that the time synchronization of the automatic driving domain controller and the multiple laser radars is solved, through double clock source setting, in the case of GPS time service exception, the internal clock source is adopted and is synchronized through NTP service, in the case of normal GPS time service, GPS time service is adopted, and the problem of system time exception in the case of GPS exception is solved.

Provided are a wireless timepiece system and a method executed by the wireless timepiece system that can reduce the labor required for registration between a wireless terminal and a wireless timepiece. The wireless timepiece includes: a generation unit that generates a first signal including device address registration request identification information requesting registration of a device address; and a communication control unit that transmits the first signal generated by the generation unit, and the terminal device is provided with a registration unit that registers the device address on the basis of the device address registration request identification information included in the first signal transmitted by the wireless timepiece when the device address is not registered.

The application discloses a power grid time frequency real-time correction method and system based on dynamic monitoring, comprising: capturing a continuous timestamp sequence from a power grid node, obtaining a time deviation signal; using an adaptive dispersion compensation algorithm to process the time deviation signal, obtaining a restored time frequency characteristic; through feature comparison, obtaining a parasitic interference index from the restored time frequency characteristic; if the parasitic interference index exceeds a preset interference threshold, processing the restored time frequency characteristic through a parasitic component suppression filter to obtain pure main frequency data; according to the comparison between the pure main frequency data and the time deviation signal, obtaining an adjustment instruction sequence; and according to the adjustment instruction sequence, performing real-time correction on the power grid time frequency. Through the fusion of multi-stage sampling, dispersion compensation and closed-loop control, the application significantly improves the power grid time synchronization accuracy and stability, effectively suppresses parasitic interference, and realizes real-time correction.

The application provides a high-precision soft-taming synchronization and time service method and system. In the synchronization taming mode, a phase deviation value between a reference signal and a local signal is measured by using a phase discriminator PD, the phase deviation value is taken as an observation value and input into a Kalman filter KF, and an accurate and smooth phase deviation estimation value is obtained. Then, the phase deviation estimation value is input into a PID controller, and a frequency control word is calculated and used for adjusting a local signal, i.e. a second pulse signal generated by a signal generator DDS. On the basis of hardware that adopts a general clock source temperature compensation crystal oscillator as a local system clock frequency source, the phase deviation and the frequency deviation are modeled, estimated and digitally compensated at a software level through a PID control algorithm and a Kalman filter, so that the system hardware cost and complexity are significantly reduced, and the demand for high-precision time synchronization is still met.

The invention provides a voltage monitor high-precision synchronous time service method based on multi-source fusion, and relates to the technical field of power systems, and the method comprises the steps: synchronously collecting a multi-source time service signal through a voltage monitor; formulating a health degree evaluation index based on the multi-source time service signal to construct a health degree evaluation model, and carrying out quantitative evaluation on each time service source signal; screening a time service signal according to a quantitative evaluation result, and carrying out time service error calibration on the screened time service signal; carrying out dynamic weight fusion on the calibrated time service signal by adopting a weight fusion algorithm to output a fusion timestamp; the fusion timestamp is converted into a local synchronous clock signal of the voltage detector, closed-loop feedback iterative optimization is carried out according to the converted local synchronous clock signal until a synchronization error is within a preset value, and a final time service signal is output; according to the invention, nanosecond-level synchronous time service is realized, and the time service stability and the anti-interference capability are remarkably improved.

The embodiment of the invention provides a time synchronization circuit based on a double-SOC chip architecture and a vehicle, and belongs to the technical field of vehicle controllers. The circuit comprises a first SOC, a second SOC, a PPSOUT module and a PPSIN module, wherein the PPSOUT module and the PPSIN module are connected through an external wire harness; the first SOC is connected with the PPSIN module, the first SOC is further connected with the PPSOUT module, and the PPSOUT module is used for converting a target output signal output by the first SOC into a target level signal and outputting the target level signal to the PPSIN module through the external wire harness; and the second SOC is also connected with the PPSIN module, and the PPSIN module is used for converting the received target level signal into a target input signal and outputting the target input signal to the second SOC. According to the embodiment of the invention, time synchronization and function linkage between the two SOCs are realized, and the realization effect of multi-domain fusion control of the intelligent driving system is improved.

The present invention provides a communication system and communication device that can shorten the switching time to another grandmaster in the event of a failure in a grandmaster with a higher priority setting. [Solution] When the fault detection unit 302 detects a fault in the first grandmaster device 2A, the time synchronization processing unit 31B of the second communication device 3B adopts the second reference time before identifying the second grandmaster device 2B as the source of the second reference time contained in the second PTP packet transmitted from the second grandmaster device 2B, and the packet transmission / reception unit 30B transmits the second PTP packet containing the adopted second reference time to the first communication device 3A and the slave device 4.

The application relates to the technical field of power systems, and provides a clock correction method and device of a power terminal, the power terminal, and a storage medium. The power terminal updates a hard clock in a running process in a time manner and records a current time into a file according to a preset period; when the power terminal is powered on normally after power failure, a current clock of a metering core and a current time of a management core are acquired, and a last start time and a last power-off time are read from the file; in the case that the last power-off time is greater than the last start time, the current clock, the current time and the last power-off time are compared in terms of credibility; in the case that the last power-off time is less than or equal to the last start time, the current clock and the current time are compared in terms of credibility, and the one with the maximum credibility is taken as a system time for time correction. Therefore, the clock correction of the power terminal can be realized without using external equipment, and the consistency, synchronism and accuracy of the clock in the power terminal are realized.

The invention provides a correction method for recording time of a monitoring unit, the monitoring unit and a photovoltaic system. The correction method comprises the following steps: acquiring actual illumination duration of the photovoltaic unit in at least two continuous days, position information of the photovoltaic unit and photovoltaic power generation data time recorded by the monitoring unit; obtaining a first theoretical illumination duration of at least two consecutive days based on the position information and the photovoltaic power generation data time; based on the actual illumination duration and the first theoretical illumination duration, the daily average timing deviation and the date offset between the actual date and the recorded date in the photovoltaic power generation data time are determined; the photovoltaic power generation data time is corrected based on the date offset and the daily average timing deviation, the problem of inaccurate time caused by unstable power supply is effectively solved, time correction is achieved through a software algorithm, frequent replacement of hardware equipment is not needed, the hardware cost and the maintenance workload are reduced, and the working efficiency is improved. And system downtime and potential risks caused by hardware replacement are reduced.

This application discloses a bell-ringing system and time synchronization method based on multi-source redundant time synchronization, specifically relating to the field of bell-ringing control technology. The bell-ringing system includes a multi-source access module, an intelligent arbitration switching module, a local high-stability timekeeping module, and a bell-ringing control module. Through a multi-source redundant time synchronization fusion design, it solves the vulnerability of traditional bell-ringing systems relying on a single signal source, achieving the core goal of "service continuity." The intelligent arbitration switching logic and configurable priority strategy enable the system to adapt to different scenario requirements. The local high-stability timekeeping module further improves reliability under extreme conditions. The product layering design can meet the cost and performance needs of different users, significantly enhancing market competitiveness. Simultaneously, the bell-ringing system is integrated with the time and frequency domain to achieve automatic time synchronization without manual calibration, improving the accuracy and intelligence of the bell-ringing process.

A motor vehicle having at least one direction indicator light unit (12, 14, 32, 34), a control unit (20, 40) configured to drive the direction indicator light unit (12, 14, 32, 34) with a scintillator signal upon actuation of an actuation device such that the direction indicator light unit (12, 14, 32, 34) flickers at a flicker frequency dependent on the scintillator signal, in which a synchronization time unit (22, 42) is provided, a synchronization time unit is connected to the control unit and configured to receive synchronization time information from an external central processing unit (50), where the control unit (22, 42) is configured to adjust the scintillator signal based on the synchronization time information within a synchronization time period (dS), the invention is characterized in that the direction indicator light units (12, 14, 32, 34) of the different motor vehicles (10, 30) are driven at a consistent flicker frequency (fS) and flicker in phase with each other by means of a flicker signal based on the synchronized time information when the actuating device is actuated.

The invention provides a wireless timepiece system and a method executed by the wireless timepiece system. The wireless timepiece system can easily determine a wireless timepiece matched with an arbitrary wireless timepiece from each of a plurality of wireless timepieces. The wireless timepiece includes: a generation unit that generates a first signal including identification information indicating display of individual identification information or a second signal that does not request registration of wireless timepiece identification information; and a communication control unit that transmits the first signal or the second signal generated by the generation unit, the terminal device being provided with: a display control unit that displays the first signal or the second signal transmitted by each of the plurality of wireless timepieces on the basis of the first signal or the second signal transmitted by each of the plurality of wireless timepieces; the individual identification information of each of the plurality of wireless timepieces is displayed so as to be distinguishable between individual identification information including identification information indicating the display of the individual identification information and individual identification information not including identification information indicating the display of the individual identification information.

The invention discloses a timing method and a medium, and relates to the technical field of communication. The method is applied to a first electronic device, and comprises the following steps: executing a first preset number of broadcast operations to obtain a first time difference and a broadcast number sent by each second electronic device corresponding to each broadcast operation, any broadcast operation comprises the following steps: generating a timing initial data packet according to a current local clock of the first electronic equipment, an identity label of the first electronic equipment and a broadcast number, adding first verification data into the timing initial data packet to obtain a timing data packet, broadcasting the timing data packet once, receiving a first time difference sent by each second electronic device for the correct timing data packet and a broadcast number in the timing data packet; determining a target broadcast number according to a first time difference sent by each second electronic device corresponding to each broadcast number; and sending the target broadcast number to each second electronic device based on the communication connection. According to the method, the current local clock of the second electronic equipment can be synchronized to the maximum extent.

What is needed is an optical scheme that provides high collection efficiency while reducing the effects of the vapor cell heating the temperature-sensitive photodetector.SOLUTION: The system for controlling, adjusting or certifying the timepiece includes a means for measuring a frequency signal and / or a rate of the timepiece or several timepieces based on a time reference provided by an optical electronic timepiece 10. Wherein the optical electronic watch comprises an atomic vapor cell 1, the atomic vapor cell comprising a sealed enclosure defining a volume containing a reference atomic vapor, the sealed enclosure comprising an optical inlet 3 allowing transmission of a probe beam adapted to excite an optical transition of the reference atoms and an optical outlet 4 allowing transmission of a fluorescence signal from the reference atoms, the sealed enclosure further comprising a wall 5 transparent to the fluorescence signal and coated on its outside with a coating reflecting the fluorescence signal.SELECTED DRAWING: Figure 5

The invention relates to an underwater laser time service system and method based on spread spectrum communication. The underwater laser time service system comprises a time service end and a time-served end. The time-served end performs spread spectrum modulation on local time and drives a laser to send an optical signal to an underwater channel; after receiving the time signal of the time-served end, the time service end carries out de-spreading processing, compares the time signal with a local high-precision time signal, carries out spread spectrum modulation on the comparison result and the local high-precision time signal, and then sends the result to an underwater channel; and after receiving the time service optical signal of the time service end, the time service optical signal is compared with the local time, and the absolute time difference between the time service optical signal and the local time is solved, so that time synchronization is completed. The anti-interference performance and confidentiality of laser signals in the underwater environment can be improved through spread spectrum modulation, long-distance transmission is achieved by combining the high transmissivity of blue and green light bands in the underwater, and finally high-precision time synchronization of the time service end and the time-served end is achieved. The method can effectively solve the problems of low underwater sound time service precision, large delay and large underwater time service attenuation of radio waves, and is especially suitable for underwater cluster time service scenes such as underwater navigation, ocean exploration and collaborative operation.

To enable accurate correction of the internal time. [Solution] The control device 1 includes a time identification unit 177 that identifies the seabed reception time, which is the absolute time when the measuring device received the first signal, based on the sea surface transmission time, which is the absolute time when a communication device located at a depth based on wave information indicating the state of waves on the sea surface detects seismic waves in response to vibration waves being emitted from the epicenter 2, and the sea surface reception time, which is the absolute time when the measuring device received the second signal, which is the response to the first signal from the measuring device, and a correction unit 179 that corrects the internal time of the measuring device associated with the measurement data based on the time difference, which is the difference between the internal time of the measuring device when the measuring device received the first signal and the identified seabed reception time.

The application discloses a sound source positioning method for transmission device fault identification, and relates to the technical field of fault identification, and the technical solution points of the method comprise the following steps: acquiring multi-path sound signal data of a transmission device, performing PTP hardware clock synchronization processing on the multi-path sound signal data to obtain synchronized sound signal data; performing noise reduction processing on the synchronized sound signal data to obtain a fault feature enhanced signal, setting a sound source positioning reference point according to the fault feature enhanced signal; and judging the fault feature enhanced signal according to the sound source positioning reference point to obtain a time delay deviation coefficient, a spatial distribution deviation coefficient, a time delay abnormal reference point and a spatial abnormal reference point; the method solves the time delay calculation deviation problem caused by the millisecond-level error of software synchronization, provides an accurate time reference for subsequent sound source positioning, improves the positioning accuracy from the meter level to the centimeter level, and meets the core requirement of accurate positioning of transmission device faults.

This application discloses a multi-sensor synchronized visual inertial odometry system and its synchronization method. The system includes: a computing platform, an MCU, a data bus, a communication interface, and two or more sensors. The computing platform is connected to the MCU via the data bus, and the MCU is connected to the sensors via the communication interface. The computing platform is also connected to both the communication interface and the sensors. The computing platform is used to initialize the MCU's parameters, acquire sensor data measured by the sensors, and perform preset processing. The MCU is used to control the sensor's triggering method according to the initialization parameters. The sensors are used to acquire sensor data. This application can reduce synchronization time errors and improve sensor compatibility, and can be widely applied in the field of multi-sensor synchronized time synchronization.

The invention relates to the technical field of synchronous processing, and discloses an examination teaching video and electronic courseware real-time synchronous processing method, which comprises the following steps: capturing an operation event of an electronic courseware in real time, synchronously collecting teaching data, and generating a corresponding first data packet and a second data packet; performing time-space synchronization on the first data packet and the second data packet to obtain a plurality of synchronization results, and verifying the synchronization results of corresponding categories based on verification models of different event types to obtain a comprehensive verification evaluation value; and judging whether the synchronization result is corrected or not according to the comprehensive verification evaluation value, if yes, generating a correction instruction corresponding to the synchronization result, and if not, generating a structured metadata file and a courseware video. Through dynamic time-space synchronization, multi-dimensional verification and intelligent correction, the automation degree, the synchronization precision and the content quality of synchronous processing of the examination teaching video and the electronic courseware are remarkably improved, and the strict requirements of scenes such as clinical skill assessment on the recording precision of the teaching process are better met.

The invention provides a nuclear power DCS system time calibration method and system, an electronic device and a medium, in the method, when a time calibration task is responded, whether a reference clock is forcibly calibrated or not is judged through local time and first calendar time of a dynamic clock, and the reference clock is forcibly calibrated without forcibly calibrating; the crystal oscillator error is quantized based on the second calendar time and the local time of the reference clock so as to capture the actual condition of the crystal oscillator deviation, then the dynamic clock timing rate is corrected by combining the first calendar time, the local time and the quantization parameter, and the obtained crystal oscillator deviation compensation parameter can dynamically adjust the dynamic clock timing rate instead of direct hopping timing. Time deviation caused by crystal oscillator errors is eliminated, the time reference of lower-level equipment can be effectively unified, and the problem of time errors caused by the crystal oscillator errors among the modules in the nuclear power DCS system is effectively solved.

Apparatus and method are disclosed. The solution comprises transmitting (400) to one or more biosignal sensor apparatuses a synchronization packet, the packet comprising timing data of the clock of the apparatus; receiving (402) an acknowledgement packet from the one or more biosignal sensor apparatuses, the acknowledgement packet comprising timing difference between the biosignal sensor apparatuses and the timing data of the synchronization packet and adjusting (404) frequency of synchronization packet transmission based on the timing differences received from the one or more biosignal sensor apparatuses.